National Daiquiri Day happens each year on July 19, when people fill their glasses with this rum-based cocktail. Did you know the daiquiri was likely invented by Cuban miners? An engineer named Jennings Cox supervised a mine in a village named Daiquiri in 1898 during the Spanish-American War. After work, Cox and his colleagues would gather at the local bar. One day Cox mixed Bacardi, sugar, and lime into a glass of ice. Named after the Daiquiri mines, the drink became a popular staple in Havana.